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Research on nucleation mechanism of the nanoscale bainite ferrite in a high carbon steel Fe–0.88C–1.35Si–1.03Cr–0.43Mn

Published online by Cambridge University Press:  26 April 2016

Qingsuo Liu ,
Yue Shen ,
Qiaoqiao Wu ,
Bin Gao  and
Xin Zhang
Qingsuo Liu*
Affiliation:
School of Materials Science and Engineering, Tianjin University of Technology, 300383, Tianjin, China
Yue Shen
Affiliation:
School of Materials Science and Engineering, Tianjin University of Technology, 300383, Tianjin, China
Qiaoqiao Wu
Affiliation:
School of Materials Science and Engineering, Tianjin University of Technology, 300383, Tianjin, China
Bin Gao
Affiliation:
School of Materials Science and Engineering, Tianjin University of Technology, 300383, Tianjin, China
Xin Zhang
Affiliation:
School of Materials Science and Engineering, Tianjin University of Technology, 300383, Tianjin, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

X-ray diffraction analysis, transmission electron microscopy, and thermodynamic calculation were used to investigate the effect of microstructural condition of austenite on the microstructural characteristics of the nanoscale bainite ferrite in a high carbon steel. As austenization temperature increases to 950 °C, there are a higher vacancy concentration and homogenized distribution level of the interstitial carbon atom in the austenite grains. The movement of more di-vacancies combination could encourage the generation of the γ → α embryo nucleus. The interstitial carbon atoms have a stronger inhibitory effect on the formation of the γ → α embryo nucleus and homogenized distribution of the interstitial carbon atoms are able to make the inhibitory effect exist everywhere in the austenite grains. In consequence, the bainite ferrite could only nucleate in a smaller area (several nanometers), and grow into slender laths in a smaller width and a larger length.

Keywords

microstructurenanoscalenucleation & growth
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 10 , 28 May 2016 , pp. 1510 - 1517
Copyright
Copyright © Materials Research Society 2016 

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References

REFERENCES

Garcia-Mateo, C., Caballero, F.G., and Bhadeshia, H.K.D.H.: Low temperature bainite. J. Phys. IV 112, 285–288 (2003).Google Scholar
Caballero, F.G. and Bhadeshia, H.K.D.H.: Very strong bainite. Curr. Opin. Solid State Mater. Sci. 8, 251–257 (2004).Google Scholar
Garcia-Mateo, C. and Bhadeshia, H.K.D.H.: Nucleation theory for high-carbon bainite. Mater. Sci. Eng., A 378, 289–292 (2004).Google Scholar
Bhadeshia, H.K.D.H.: The nature, mechanism and properties of strong bainite. In Proceedings of the 1st international symposium on steel science (IS3-2007) (The Iron and Steel Institute of Japan, Japan, 2007).Google Scholar
Caballelo, F.G., Miller, M.K., Bahu, S.S., and Garcia-Mateo, C.: Atomic scale observations of bainite transformation in a high carbon high silicon steel. Acta Mater. 55, 381–390 (2007).Google Scholar
Hulme-Smith, C.N., Lonardelli, I., Dippelc, A.C., and Bhadeshia, H.K.D.H.: Experimental evidence for non-cubic bainite ferrite. Scr. Mater. 69, 409–412 (2013).Google Scholar
Caballero, F.G., Miller, M., Garcia-Mateo, C., and Cornide, J.: New experimental evidence of the diffusionless transformation nature of bainite. J. Alloys Compd. 577, S626–S630 (2013).Google Scholar
Caballero, F.G., Yen, H.-W., Miller, M.K., Chang, H.-T., Garcia-Mateo, C., and Yang, J.-R.: Three phase crystallography and solute distribution analysis during residual austenite decomposition in tempered nanocrystalline bainite steels. Mater. Charact. 88, 15–20 (2014).Google Scholar
Rakha, K., Beladi, H., Timokhina, I., Xiong, X.Y., Kabra, S., Liss, K.D., and Hodgson, P.: On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography. Mater. Sci. Eng., A 589, 303–309 (2014).Google Scholar
Babu, S.S., Vogel, S., Garcia-Mateo, C., Clausen, B., Morales-Rivase, L., and Caballero, F.G.: Microstructure evolution during tensile deformation of a nanoscale bainite steel. Scr. Mater. 69, 777–780 (2013).Google Scholar
Gong, W., Tomota, Y., Harjo, S., Sua, Y.H., and Aizawa, K.: Effect of prior martensite on bainite transformation in nanobainite steel. Acta Mater. 85, 243–249 (2015).Google Scholar
Kong, D.Q., Liu, Q.S., and Yuan, L.J.: Effect of austenitizing temperature on formation of hard bainite. Met. Sci. Heat Treat. 56, 444–448 (2014).Google Scholar
Leibfried, G. and Breuer, N.: Point defects in metal, Vol. 1, 2 (Springer, Berlin, 1978).Google Scholar
Wang, Y.C.: The formation energy of vacancy of metal. Acta Phys. Sin. 15, 469–474 (1995).Google Scholar
Kuramoto, E., Ohsawa, K., and Tsutsumi, T.: Computer simulation of defects interacting with a dislocation in Fe and Ni. J. Nucl. Mater. 283–287, 778–783 (2000).Google Scholar
Kulikov, D. and Hou, M.: A model study of displacement cascades distributions in zirconium. J. Nucl. Mater. 342, 125–134 (2005).Google Scholar
Croeker, A.G., Doneghan, M., and Ingle, K.W.: The structure of small vacancy clusters in face-centred-cubic metals. Philos. Mag. A 41, 21 (1980).Google Scholar
Johnson, R.A.: Analytic nearest-neighbor model for fcc metals. Phys. Rev. B: Condens. Matter Mater. Phys. 37, 3924–3931 (1988).Google Scholar
Johnson, R.A.: Phase stability of fcc alloys with the embedded-atom method. Phys. Rev. B: Condens. Matter Mater. Phys. 41, 9717–9720 (1999).Google Scholar
Caballero, F.G., Miller, M.K., Bahu, S.S., and Garcia-Mateo, C.: Atomic scale observations of bainite transformation in a high carbon high silicon steel. Acta Mater. 55, 381–390 (2007).Google Scholar